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21 MnCrB 5-4

Germany DIN 21MnCrB5-4 Heat treatable alloyed MnCr steel and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 21MnCrB5-4 / 21 MnCrB 5-4
Category Grade Standard Region/Area Standard Content
Metals 21 MnCrB 5-4 -- Germany Heat treatable alloyed MnCr steel

Chemical composition(mass fraction)(wt.%) of the 21 MnCrB 5-4

Element Min Max Similar
Si - 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mn 1.2000 1.5000 -
Cr 0.9000 1.2000 -
C 0.1800 0.2400 -
B 0.0008 0.0050 -

Mechanical Properties of steel grade 21 MnCrB 5-4

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
992 (≥) 993 (≥) 34 31 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical Properties of steel grade 21 MnCrB 5-4

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
22 - -     0.33 -  
397 681 - 31.3 244   -  
944 - 24 41.2   431 341

Heat Treatment of steel grade 21 MnCrB 5-4

Heat treated : 1584°C - 1649°C

Technological Curves of steel grade 21 MnCrB 5-4

Cross Reference Table (Equivalent Grade) of 21 MnCrB 5-4

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